Dating is not against the law. For a 20 year old to have sex with a 16 year old IS against the law. If a 20 yr old and a 16 yr old have sex tehnically it's called rape and yes they can get into trouble but just date someone your own age .
There are no laws about dating at any age. However, any sexual contact would be against the law. And why would a 17 year old want to date a 12 year old? There could only be one reason, and it is against the law!
Yes, there are no laws against dating but as minors your parents have to be OK with it of course. ANSWER: Define "dating." IF you mean going out and having fun as friends, it is fine. If you mean having sexual intercourse, it is against the law.